3-D Computational Ghost Imaging With Extended Depth of Field for Measurement

Yang, Zhaohua; Li, Guanghan; Yan, Ruitao; Sun, Yu; Wu, Ling‐An; Zhang, Ai-Xin

doi:10.1109/tim.2019.2898051

Cited by 13 publications

(4 citation statements)

References 26 publications

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“…The imaging distances of the two targets in the xy-plane are 17 cm and 19 cm, respectively. The imaging region is divided into 2205 (21×21×5 in x-, yand z-direction) imaging voxels with the side length of 1 cm, which is selected in accordance with the calculated in (6). The imaging simulations are implemented using the UFDMT drop in the number of useful measurement modes, the UFDMT imaging quality decreases in Fig.…”

Section: A 3d Imaging Through Cst Simulationsmentioning

confidence: 99%

“…[1][2][3][4][5]. Unlike conventional imaging systems such as the synthetic aperture radar (SAR) or the phased array radar (PAR), no raster scanning mechanism is needed under the CI scheme, which relaxes the hardware constraints and improves the data acquisition efficiency [6][7][8][9]. In an ideal CI scenario, the scene is illuminated by a set of orthogonal measurement modes [9] and the target information is compressed into the echoes.…”

Section: Introductionmentioning

confidence: 99%

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Three-Dimensional Computational Polarimetric Imaging With a Hyperuniform Frequency-Diverse Metacavity Transceiver

Zhao,

Zhu,

Chen

et al. 2024

IEEE Trans. Instrum. Meas.

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Polarimetric information is beneficial for enhancing the imaging quality of computational imaging systems. However, the hardware that can extract the polarimetric information in a computational polarimetric imaging (CPI) system remains heavily unstudied. Thus, in this paper, a hyperuniform frequency-diverse metacavity transceiver (HFDMT) that is capable of retrieving the polarimetric information throughout the K-band is proposed. The proposed HFDMT is a metacavity etched with cross-shaped irises arranged in a hyperuniform distribution. The transmitter and the receiver of a conventional CPI system are replaced by two isolated ports of the HFDMT, which significantly simplifies the hardware architecture. Firstly, to satisfy the requirements for extracting the polarimetric information while sustaining the high efficiency and the frequency-diversity, the cross-shaped iris is proposed. The cross-shaped iris working efficiently and independently under two orthogonal polarizations also exhibits frequency-diverse radiation responses. Moreover, to improve the spatial-orthogonality of the measurement modes, the hyperuniform distribution is adopted to arrange the irises. Using the hyperuniform distribution results in up to 33% increase in the number of useful measurement modes under different signal-to-noise ratios, as compared to the uniform distribution. Then, the performance of the HFDMT is evaluated. The S-parameters demonstrate that the HFDMT exhibits good impedance match and high port isolation characteristics. In total 600 measurement modes with correlation coefficients lower than 0.35 are obtained from 18 to 26 GHz. Finally, a prototype is fabricated. The 3D CPI feasibility using the proposed HFDMT is verified by both full-wave simulations and measurements.

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Section: A 3d Imaging Through Cst Simulationsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Three-Dimensional Computational Polarimetric Imaging With a Hyperuniform Frequency-Diverse Metacavity Transceiver

Zhao,

Zhu,

Chen

et al. 2024

IEEE Trans. Instrum. Meas.

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show abstract

“…However, in the field of close-range measurement, especially in the 1m range, the accuracy of ToF depth cameras has a large gap compared with other depth cameras, which limits its application in the field of close-range high accuracy. In 2019, Yang et al 18 combine binocular stereo vision which is a kind of 3D imaging technique and CGI to extend 3D measurement's depth of field. Binocular vision calculates the distance from the target to the system according to the parallax.…”

Section: Introductionmentioning

confidence: 99%

3D computational ghost imaging via binocular vision

Zhang

Chang

Lin

et al. 2023

International Conference on Precision Instruments and Optical Engineering (PIOE 2022)

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Ghost imaging, a new type of active imaging, has attracted much attention because of its unique imaging mechanism. As an important application of ghost imaging, three-dimensional correlative imaging has been developed in recent years. At present, the main method of 3D ghost imaging is to use the time-of-flight method to obtain the distance from the target object to the imaging system. However, this method is not easy to achieve millimeter-accurate distance measurement in the distance range within 1m because of the limitation of the measuring instruments. In this paper, by using binocular stereo vision which is a more intuitive 3D imaging method combined with computational ghost imaging, millimeteraccurate distance measurement can be performed on objects within 50 cm. Binocular 3D ghost imaging performs well at close range and is relatively simple to implement, which may help robots avoid obstacles and medical imaging.

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“…Over the last two decades, attention has shifted significantly towards correlated imaging with incoherent thermal light due to its exceptional behaviors [7][8][9][10][11][12][13] and prospective practical applications, including pattern recognition [14], x-ray image [15,16], optical image encryption [17][18][19][20][21], and remote sensing [22][23][24][25]. By utilizing the spatial correlation between separated incoherent light fields, correlated imaging forms an image or a diffraction pattern of the object under spatially incoherent illumination.…”

Section: Introductionmentioning

confidence: 99%

Correlated reconstruction for the phase-only Fourier hologram with incoherent illumination

Zhao¹,

Zhang²,

Cui³

et al. 2021

J. Opt.

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Regarding a phase-only Fourier hologram, coherent illumination is required in its optical reconstruction. However, this requirement faces a challenge in lensless Fourier-transform correlated imaging with thermal sources. In this research, a correlated reconstruction scheme for the phase-only Fourier hologram with spatially incoherent illumination by utilizing intensity fluctuation correlation measurements is proposed. Numerical simulation and optical experiments were conducted to verify the feasibility of the correlated reconstruction scheme. Because the proposal requires neither a coherent light source nor a lens, holographic reconstruction can circumvent the limitation of the spatial coherence light source and the influence of lens aberrations.

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3-D Computational Ghost Imaging With Extended Depth of Field for Measurement

Cited by 13 publications

References 26 publications

Three-Dimensional Computational Polarimetric Imaging With a Hyperuniform Frequency-Diverse Metacavity Transceiver

Three-Dimensional Computational Polarimetric Imaging With a Hyperuniform Frequency-Diverse Metacavity Transceiver

3D computational ghost imaging via binocular vision

Correlated reconstruction for the phase-only Fourier hologram with incoherent illumination

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